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* Copyright (c) 2008, Whiteboard-IT
* All rights reserved.
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* the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this list of conditions and the following 
 * disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
 * disclaimer in the documentation and/or other materials provided with the distribution.
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* Neither the name of Whiteboard-IT, LLC nor the names of its contributors may be used to endorse or promote 
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using System;
using System.Collections;
using System.Linq;

namespace Mite
{
	public static class Guard
	{
		public static void ArgumentNotNull(string argumentName, object argumentValue)
		{
			if (argumentValue == null)
				throw new ArgumentNullException(argumentName);
		}

		public static void StringArgumentNotNullOrEmpty(string argumentName, string argumentValue)
		{
			if (String.IsNullOrEmpty(argumentValue))
				throw new ArgumentNullException(argumentName);
		}

		/// <summary>
		/// Insures that <paramref name="sequence"/> is not null or empty.
		/// </summary>
		/// <param name="sequenceName">Name of the variable.</param>
		/// <param name="sequence">Sequence to verify.</param>
		/// <exception cref="ArgumentNullException"><paramref name="sequence"/> is null.</exception>
		/// <exception cref="ArgumentException"><paramref name="sequence"/> is empty.</exception>
		public static void SequenceNotNullOrEmpty(string sequenceName, IEnumerable sequence)
		{
			if (sequence == null)
				throw new ArgumentNullException("sequence");
			if (sequence.Cast<object>().Count() == 0)
				throw new ArgumentException("Sequence can not be empty.", sequenceName);
		}
	}
}